wanna,
take the advise you have been given here, and that is to get your beams/foundations etc done specific for your job.using someone elses foundations for a completely different house is not adviseable.
for the small amount of money it costs to do will be well worth it in the future.
wanna-'oh i saved 10,000 baht by copying the foundations from someone else'
lawyer-'oh so thats why the place has fallen down'
(lawyer has been employed to find out who is at fault for the house falling down)

